/*
 *  Copyright (c) 2023-2025, Agents-Flex (fuhai999@gmail.com).
 *  <p>
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *  <p>
 *  http://www.apache.org/licenses/LICENSE-2.0
 *  <p>
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 */
package com.agentsflex.core.util;

import com.agentsflex.core.message.HumanMessage;
import com.agentsflex.core.message.Message;

import java.util.List;

public class MessageUtil {

    public static HumanMessage findLastHumanMessage(List<Message> messages) {
        if (messages == null || messages.isEmpty()) {
            return null;
        }
        for (int i = messages.size() - 1; i >= 0; i--) {
            Message message = messages.get(i);
            if (message instanceof HumanMessage) {
                return (HumanMessage) message;
            }
        }
        return null;
    }

    public static String getToolChoice(Message message) {
        if (message instanceof HumanMessage) {
            return ((HumanMessage) message).getToolChoice();
        }
        return null;
    }
}
